Rather than trilands with no use for the other color, run terramorphic expanse and evolving wilds. I'd probably also try to squeeze Drana, Kalastria Bloodchief in there someplace (probably over a Bloodwitch). Against Jund she seems way better.

Is Smother the best choice for removal? Missing Baneslayer seems like it would be pretty important, but I guess you do have all those Bloodwitches.

Consuming Vapors and/or Tendrils of Corruption seem like they belong somewhere in here.